scholarly journals Serial Use of Helosciadum nodiflorum and Typha latifolia in Mediterranean Constructed Wetlands to Naturalize Effluents of Wastewater Treatment Plants

Water ◽  
2018 ◽  
Vol 10 (6) ◽  
pp. 717
Author(s):  
Antonio Camacho ◽  
Antonio Picazo ◽  
Carlos Rochera ◽  
María Peña ◽  
Daniel Morant ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetlands ◽  
Wastewater Treatment Plants ◽  
Typha Latifolia

Evaluation of Small Wastewater Treatment Plants in the County of Århus – Denmark

1993 ◽  
Vol 28 (10) ◽  
pp. 33-41
Author(s):  
Jes la Cour Jansen ◽  
Bodil Mose Pedersen ◽  
Erik Moldt
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetlands ◽  
Biological Treatment ◽  
Wastewater Treatment Plants ◽  
Chemical Precipitation ◽  
Common Type ◽  
Treatment Efficiency ◽  
Effluent Quality ◽  
Different Types

Influent and effluent data from about 120 small wastewater treatment plants (100 - 2000 PE) have been collected and processed. Seven different types of plants are represented. The effluent quality and the treatment efficiency have been evaluated. The most common type of plant is mechanical/biological treatment plants. Some of them are nitrifying and some are also extended for chemical precipitation of phosphorus. Constructed wetlands and biological sandfilters are also represented among the small wastewater treatment plants.

Design Recommendations for Subsurface Flow Constructed Wetlands for Nitrification and Denitrification

1999 ◽  
Vol 40 (3) ◽  
pp. 257-263 ◽  
Author(s):  
Christoph Platzer
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetlands ◽  
Wastewater Treatment Plants ◽  
Subsurface Flow ◽  
Oxygen Demand ◽  
Oxygen Balance ◽  
Vertical Flow ◽  
Soil Aeration ◽  
Return Rates ◽  
Nitrification And Denitrification

The paper presents a design for nitrogen removal in subsurface flow wetlands. The nitrification in the vertical-flow beds (VFBs) is clearly determined by the oxygen balance in the filter. Full nitrification can only be achieved when the oxygen balance is positive. For sizing purposes equations for the calculation of oxygen demand and oxygen input are given. Three possibilities to achieve sufficient soil aeration are presented and explained. For the denitrification two possibilities are presented. From technical wastewater treatment plants predenitrification is well known. Return rates up to 200% can be used without hydraulic problems for the VFBs. In cases of low C/N ratios an additional application of HFBs has to be used. The design can be carried out using a design of 1 g NO3-N/m2,d achieving a 65% removal in more than 90% of the cases. The paper discusses some of the equations presented internationally. The suitability of the use of k-values for the processes nitrification and denitrification is especially questioned.

Application of constructed wetlands for wastewater treatment in Nepal

2001 ◽  
Vol 44 (11-12) ◽  
pp. 381-386 ◽  
Author(s):  
R.R. Shrestha ◽  
R. Haberl ◽  
J. Laber ◽  
R. Manandhar ◽  
J. Mader
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetlands ◽  
Constructed Wetland ◽  
Wastewater Treatment Plants ◽  
River System ◽  
Present Condition ◽  
Successful Implementation ◽  
Urban Centers ◽  
Untreated Wastewater ◽  
Under Construction

Surface water pollution is one of the serious environmental problems in urban centers in Nepal due to the discharge of untreated wastewater into the river-system, turning them into open sewers. Wastewater treatment plants are almost non-existent in the country except for a few in the Kathmandu Valley and even these are not functioning well. Successful implementation of a few constructed wetland systems within the past three years has attracted attention to this promising technology. A two-staged subsurface flow constructed wetland for hospital wastewater treatment and constructed wetlands for treatment of greywater and septage is now becoming a demonstration site of constructed wetland systems in Nepal. Beside these systems, five constructed wetlands have already been designed and some are under construction for the treatment of leachate and septage in Pokhara municipality, wastewater in Kathmandu University, two hospitals and a school. This paper discusses the present condition and treatment performance of constructed wetlands that are now in operation. Furthermore, the concept of the treatment wetlands under construction is also described here. With the present experience, several recommendations are pointed out for the promotion of this technology in the developing countries.

Sustainable sewage solutions for small agglomerations

2005 ◽  
Vol 52 (12) ◽  
pp. 25-32 ◽  
Author(s):  
A. Galvão ◽  
J. Matos ◽  
J. Rodrigues ◽  
P. Heath
Keyword(s):  
Wastewater Treatment ◽  
Rural Communities ◽  
Constructed Wetlands ◽  
Rural Areas ◽  
Wastewater Treatment Plants ◽  
Construction Costs ◽  
Small Communities ◽  
Trickling Filters ◽  
Visual Impact ◽  
Surrounding Areas

In a significant number of European countries, the need for providing appropriate treatment for the effluents of small rural communities is still especially relevant. In fact, in countries like Portugal, Spain, and many others, significant amounts of investment will be addressed in the next few years to the construction of small Wastewater Treatment Plants (WWTP). The problems faced when constructing and operating WWTP serving small communities may be relevant when energy and labour costs are relatively high, or when the visual impact on the surrounding areas is especially negative. Sustainable treatment solutions require the selection of appropriate technologies using fewer resources. In this paper, information is presented about sustainability indicators of twenty-one small secondary wastewater treatment plants, including conventional (trickling filters and extended aeration plants) and non-conventional treatment systems (constructed wetlands). The data refer to allocated areas per inhabitant, amounts of concrete per inhabitant, power per inhabitant, and construction and installation costs per inhabitant. The data seem to show that for different reasons, constructed wetlands are promising treatment solutions for application to rural areas in particular because of the relatively low power requirements and relatively low construction costs for served populations below 500 inhabitants.

The role of sand, marble chips and Typha latifolia in domestic wastewater treatment – a column study on constructed wetlands

2016 ◽  
Vol 37 (19) ◽  
pp. 2508-2515 ◽  
Author(s):  
Rakesh Kadaverugu ◽  
Rita P. Shingare ◽  
Karthik Raghunathan ◽  
Asha A. Juwarkar ◽  
Prashant R. Thawale ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetlands ◽  
Typha Latifolia ◽  
Domestic Wastewater ◽  
Column Study ◽  
Domestic Wastewater Treatment

scholarly journals Potential of Typha latifolia L. for phytofiltration of iron-contaminated waters in laboratory-scale constructed microcosm conditions

2021 ◽  
Vol 11 (2) ◽  
Author(s):  
Maibam Dhanaraj Meitei ◽  
Majeti Narasimha Vara Prasad
Keyword(s):  
Wastewater Treatment ◽  
Removal Efficiency ◽  
Constructed Wetlands ◽  
Iron Uptake ◽  
Preliminary Report ◽  
Low Cost ◽  
Typha Latifolia ◽  
Plant Tissues ◽  
Copper Supplementation ◽  
Contaminated Waters

AbstractThe present study gave a preliminary report on the phytofiltration of iron-contaminated waters and aggravation of iron uptake by copper supplementation using Typha latifolia L. in constructed microcosms. During the experiment, Fe concentrations reduced up to 1.67 ± 0.076 mg L−1 (94.43% removal efficiency) and 0.087 ± 0.013 mg L−1 (97.10% removal efficiency) by 14th day from the initial concentrations of 30 mg L−1 in the microcosm setups. Iron accumulation in the plant tissues was 2425.65 ± 41.01 mg kg−1 (Fe with Cu) compared with 1446.00 ± 36.01 mg kg−1 (without Cu), revealing that Cu addition in the microcosm setup magnifies Fe accumulation and removal. Thus, the results signify that constructed wetlands (CW) can serve as the low-cost, ecofriendly alternative for wastewater treatment.

scholarly journals Livestock Wastewater Treatment in Constructed Wetlands for Agriculture Reuse

2020 ◽  
Vol 17 (22) ◽  
pp. 8592
Author(s):  
Sofia Dias ◽  
Ana P. Mucha ◽  
Rute Duarte Crespo ◽  
Pedro Rodrigues ◽  
C. Marisa R. Almeida
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Phragmites Australis ◽  
Constructed Wetlands ◽  
Reclaimed Water ◽  
Typha Latifolia ◽  
Oxygen Demand ◽  
Livestock Wastewater ◽  
Phosphate Ions ◽  
Industry Effluent

The aim of this study focused on the evaluation of constructed wetlands (CWs) microcosms, on a laboratory scale, for the removal of metals from a pig industry effluent while maintaining effluent organic matter and nutrients levels for its later used as a fertilizer. CWs with different macrophytes (Phragmites australis and Typha latifolia) and different substrates (light expanded clay aggregate and lava rock) were tested. Results showed high removals of metals during CWs treatment, with removal rates reaching >80% for Cd, Cr, Cu, Fe, Mn, and Zn after 2 days of treatment in CWs planted with T. latifolia and >60% in CWs planted with P. australis. Significant differences were only found between substrates for Fe and Mn in CWs with P. australis. Removal of organic matter (through chemical oxygen demand (COD)) was >77%, with no significant differences between substrates or plants. Removals of ammonium and phosphate ions ranged between 59–84% and 32–92%, respectively, in CWs with P. australis and 62–75% and 7–68% in CWs with T. latifolia, with no significant differences between substrates. Overall, CWs showed potential to be efficient in removing toxic contaminants, as metals, while maintaining moderated levels of nutrients, allowing the use of reclaimed water in agriculture, namely as fertilizer. If one aims for a short CW treatment, CW planted with T. latifolia and expanded clay as substrate could be the more suitable choice.

scholarly journals Removal and transformation of pharmaceuticals in wastewater treatment plants and constructed wetlands

2013 ◽  
Vol 6 (1) ◽  
pp. 97-117 ◽  
Author(s):  
E. Lee ◽  
S. Lee ◽  
J. Park ◽  
Y. Kim ◽  
J. Cho
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetlands ◽  
Surface Waters ◽  
Biological Treatment ◽  
Wastewater Treatment Plants ◽  
Wastewater Effluent ◽  
Trace Organic Compounds ◽  
Initial Transformation ◽  
The Stability ◽  
D Value

Abstract. Since trace organic compounds such as pharmaceuticals in surface water have been a relevant threat to drinking water supplies, in this study the removal of pharmaceuticals and transformation of pharmaceuticals into metabolites were investigated in the main sources of micropollutants such as wastewater treatment plants (WWTPs) and engineered constructed wetlands. Pharmaceuticals were effectively removed by different WWTP processes and wetlands. Pharmaceutical metabolites with relatively low log D value resulted in the low removal efficiencies compared to parent compounds with relatively high log D value, indicating the stability of metabolites. And the constructed wetlands fed with wastewater effluent were encouraged to prevent direct release of micropollutants into surface waters. Among various pharmaceuticals, different transformation pattern of ibuprofen was observed with significant formation of 1-hydroxy-ibuprofen during biological treatment in WWTP, indicating preferential biotransformation of ibuprofen. Lastly, transformation of pharmaceuticals depending on their structural position was investigated in terms of electron density, and the electron rich C1 = C2 bond of carbamazepine was revealed as an initial transformation position.

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